I have been doing a lot of research about bitcoin and blockchain. A lot of informacion across the Internet can be found where many people explains the basics of bitcoin an it´s underlaying technology, but I have a question that I can´t quite find the answer and beg for this community help

If one searchs in Google Almighty one can track down bitcoin to the first block issued which is told to have the hash:

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But, to which data I have to apply SHA256 in order to get the given hash?

You need to apply recursive hashing to all the transactions in the block(in a correct order) to create a merkel tree, and then hash the final hash from the merkel tree with infos that you mentioned

When a pool is mining, does it receives the block info and its hash? From who receives that data?

When mining, the miners get the hash of the previous block. Transactions are read from the Mempool. And try to create a valid block(that satisfy the difficulty target) by doing trillions of trillions of hashing (POW)

I would recommend Mastering Bitcoin by A.Antonopoulos. It's my reference to everything in the Bitcoin space